Safety pin



y 6, 1958 H. s. NONAKA 2,833,013

SAFETY PIN Y Filed July 1, 1957 Henry 5. Nona/r0 IN V EN TOR.

SAFETY PIN Henry S. Nonakn', Los Angeles, Calif. Application July 1,1957, Serial No. 669,071 V 4 Claims. (c1. 24- 156) The present inventionrelates to new and useful improvements in safety pins and has for one ofits important objects to provide, in a manner as hereinafter set forth,

an article of this characterwhich may be expeditiously inserted with onehand with a minimum of effort.

Another very important object of the invention is to provide an improvedfastener of the aforementioned character comprising novel means forfrictionally securing the pin in either closed or open position.

Other objects of the invention are to provide an improved safety pin ofthe character described which will be comparatively simple inconstruction, strong, durable, compact, of light weight, attractive inappearance and which may be manufactured at low cost.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure l is a perspective view of an improved safety pin constructed inaccordance with the present invention;

Figure 2 is an enlarged view in vertical longitudinal section throughthe article;

Figure 3 is a vertical longitudinal sectional view, showing the pinclosed;

Figure 4 is a detail view in transverse section, taken substantially onthe line 44 of Figure 2; and

Figure 5 is a view in transverse section, taken substantially on theline 5-5 of Figure 2.

Referring now to the drawing in detail, it will be seen that theembodiment of the invention which has been illustrated comprises asubstantially V-shaped bar of suitable material, preferably plastic,whichis designated generally by reference character 6. The bar 6, whichmay also be of any desired dimensions, comprises a pair of integraldivergent arms 7 and 8. Formed integrally with the outer or free end ofthe arm 8 is a horizontal tubular guide 9. Formed integrally with theouter or free end of the arm 7 is a substantially conical socket orkeeper 10 which is aligned with the guide 9.

Mounted for swinging movement on the angle or bight portion of the bar 6is a telescopic bar 11. The bar 11 comprises a metallic strip or strap12 having one end pivotally secured, as at 13, to the angle or bightportion of the substantially V-shaped bar 6. The bar 11 further includesa metallic female member 14 in the form of a tube of rectangularcross-section which is slidable on the male member 12. The inner endportion of the female member 14 has formed longitudinally therein a slot15 the purpose of which will be presently set forth.

The tubular female member 14 of the telescopic bar 11 is closed at itsouter end and terminates in a head or the like 16 in which one endportion of a pin 17 is pivotally connected at 18 for swinging movementin a vertical plane. The pin 17 is slidable through the guide 9 forengagement in the socket 10 when said pin is in closed position. Thehead 16 is recessed to accommodate 2 the pivoted end of thepin 17. Thehead 16 is further provided with a raised shoulder portion 19 which isengageable beneath the pivoted end portion of the pin 17 to function asa stop for limiting the opening movement of said pin and preventing itswithdrawal from the guide 9. This is shown to advantage in Figure 2 ofthedrawing.

Fixed longitudinally beneath the inner end portion of the arm 8 is a rib20. One end portion of a bowed or humped flat spring 21 is fixedlongitudinally on the rib 20. The free end portion of the spring 21rests on the strap or male member 12 of the telescopic bar 11 and isfn'ctionally engageable under tension in the tubular female member 14when the safety pin is closed, at which time the slot 15 frictionallyreceives the rib 20.

It -is thought that the operation of the device will'be readily apparentfrom'a consideration of the foregoing. Briefly, to close the fastener itis held in one hand with the thumb and index finger of that handengaged, respectively, with the socket or keeper 10 and the head 16. Thearm 11 is then forced inwardly for sliding the pin 17 through the guide9 into the socket 10 to its closed position as seen in Figure 3 of thedrawing. Of course, during this operation the bar 11 swings on its pivot13 and contracts, the female member 14 telescoping on the male member12. Thus, the pin 17 is permitted to travel in a true horizontal plane,said pin swinging relative to the arm 11 on the pivot 18. The outer endportion of the arm 8 is recessed, as at 22 to accommodate the stopshoulder 19. As the bar 11 telescopes and swings inwardly toward the arm8 the bowed or humped spring 21 is forced to enter the tubular femalemember 14 and, being thus straightened out, is tensioned forfrictionally securing the pin in closed position. This frictionalretention is increased by the engagement of the rib 20 in the slot 15.Of course, to open the device the foregoing procedure is substantiallyreversed. The stop shoulder 19 engages and arrests the pin 17 when thepoint 23 thereof enters the tubular guide 9. The construction andarrangement of parts is such that the pin 19 is also retained in openposition by friction.

Since numerous modifications and changes will readily occur to thoseskilled in the art, it is not desired to limit the invention to theexact construction and operation shown and described, and accordinglyall suitable modifications and equivalents may be resorted to, fallingwithin the scope of the invention as claimed.

What is claimed as new is as follows:

1. An improved safety pin of the character described comprising: asubstantially V-shaped bar, a tubular guide on one end of the bar, asocket on the other end of said bar aligned with said guide, atelescopic bar pivotally mounted on the V-shaped bar, a pin having oneend pivotally secured to the free end portion of the telescopic bar,said pin being slidable in the guide and engageable in the socket whenin closed position, and means for securing the pin in the socket,

2. An improved safety pin of the character described comprising: asubstantially V-shaped bar, a tubular guide on one end of the bar, asocket on the other end of said bar aligned with said guide, atelescopic bar pivotally mounted on the V-shaped bar, a pin having oneend pivotally secured to the free end portion of the telescopic bar,said pin being slidable in the guide and engageable in the socket whenin closed position, and means for securing the pin in the socket, saidtelescopic bar including a tubular female member and a male memberslidably engaged therein, said means comprising an arcuate spring fixedon the V-shaped bar and frictionally engageable in said female member.

3. An improved safety pin of the character described comprising: asubstantially V-shaped bar, a tubular guide on one end of the bar, asocket on the other end of said Patented May 6, 1958 bar aligned withsaid guide, a telescopic bar pivotally mounted on the V-shaped bar, apin having one end pivotally secured to the free end portion of thetelescopic bar, said gpin beinghslidabl'e in the? guide and,gengage'ablev in thesocket when in closedtposition, and wm'eansiforqsecuring the ,pin ;inj the :SOCkCt', said telescopic-bar including a:tubular female member] and; aimale member slidably engaged therein,said means comprising, an arof said one arm, a telescopic bar includinga male member having one end pivotally secured to the V-shaped bar atthe juncture of the arms, saidtelescopic bar further including a tubularfemale member slidable on said male member, a pin slidable through theguide for engagement in the socket and having one end connected to thefree end portion of-the telescopic bar, said female member having alongitudinal slot in its inner end portion for frietionally receivingthe rib when the pin is in closed position, an arcuate spring mountedlongitudinally on the rib and engag'e'able under tension withthe malemember in the female member for frictionallyiresisting sliding movementof the latter, and astop shoulder on the free end portion of thetelescopic arm engageable with the pin for positively limiting slidingmovement thereof toward open position through the guide.

No references cited.

